This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A366411 #8 Oct 09 2023 14:01:20 %S A366411 1,5,29,353,5485,260323,15277779,3211933481,790502793321, %T A366411 751204032996623,808973740240335345,3499358510266725179221, %U A366411 16872857815987642169925097,333905047994165804391613820789,7308582206982080422190512432243395 %N A366411 a(n) is the total number of Hamiltonian paths on rectangular grids of size n X k for 1 <= k <= n. %e A366411 For n = 2, the a(2) = 5 solutions are: %e A366411 +---+ +---+---+ +---+---+ +---+---+ +---+---+ %e A366411 | | | | | | | | | | | | | | %e A366411 | * | | **|** | | * | * | | **|** | | **|** | %e A366411 | * | | | * | | * | * | | * | | | * | * | %e A366411 +---+ +---+---+ +---+---+ +---+---+ +---+---+ %e A366411 | * | | | * | | * | * | | * | | | * | * | %e A366411 | * | | **|** | | **|** | | **|** | | * | * | %e A366411 | | | | | | | | | | | | | | %e A366411 +---+ +---+---+ +---+---+ +---+---+ +---+---+ %Y A366411 Row sums of triangle A366399. %K A366411 nonn,walk,more %O A366411 1,2 %A A366411 _Douglas Boffey_, Oct 09 2023 %E A366411 More terms (using A332307) from _Pontus von Brömssen_, Oct 09 2023